Meteorology- Weather Reports and Charts

Question 1

METAR

Answer 1

Aviation Routine Weather Report

Question 2

Is the wind in a METAR given in true or magnetic?

Answer 2

TRUE

Question 3

What are the two categories included in a METAR under significant weather?

Answer 3

Precipitation
Sky obscuration

Question 4

What are three things that may cause a SPECI to be issued

Answer 4

Thunderstorms
Windshift of more than 45 degrees
Weather changing from VFR to MVFR or to IFR

Question 5

What does VV mean in the following: VV005

Answer 5

The vertical visibility is 500 feet

Question 6

What three things can a manual observer add to an AWOS?

Answer 6

Thunderstorm
Precipitation
Obscurations to visibility

Question 7

ASOS

Answer 7

Automated Surface Observing System

Question 8

AWOS

Answer 8

Automated Weather Observing System

Question 9

When does the AUTO appear in a METAR?

Answer 9

It means that the report is either a AWOS or ASOS

Question 10

How can you tell if a weather report is an ASOS or AWOS?

Answer 10

It will show AO1 or AO2 in the remarks

Question 11

METER: CHINO

Answer 11

Ceiling Height Indicator Not Operating

Question 12

METAR: FC

Answer 12

Funnel Cloud

Question 13

METAR: M 1/4SM, what is the visibility?

Answer 13

“less than” 1/4SM

Question 14

METAR: SLP993 6////

Answer 14

Sea Level Pressure: 999.3 hPA
6////: Indeterminable amount of precipitation over the last 3 hours.

Question 15

PIREP: FV000

Answer 15

Flight Visibility is 0SM

Question 16

TAF: P6SM

Answer 16

Greater than 6 Statue Miles

Question 17

TAF: VC

Answer 17

It means Vicinity. This is 5-10 miles radius from the airport.

Question 18

TAF: PROB30 and PROB40

Answer 18

30 to 39% chance that thunderstorms will occur
40 to 49% chance that thunderstorms will occur

Question 19

TAF: Read the valid time in the following
031745Z 031818

Answer 19

Issued 3rd day of the month at 1745Z
Valid 3rd day of the month at 1800Z to the following day at 1800Z

Question 20

TAF: PROB40 0103

Answer 20

There is a 40-49% probability between 0100Z and 0300Z

Question 21

Winds and Temperatures Aloft: Are winds given in True or Magnetic?

Answer 21

True

Question 22

Winds and Temperatures Aloft: The temperatures above what altitude are always negative?

Answer 22

24,000 feet

Question 23

Winds and Temperatures Aloft: @26,000 it shows the following: 263821. What does this mean?

Answer 23

At 260 degrees TRUE, the wind velocity is 38 knots and the temperature is -21C.

Question 24

What is the standard atmosphere and the lapse rate?

Answer 24

15C and 29.92
2C/1,000
1”/1,000

Question 25

Winds and Temperatures Aloft: What is the significance of the following 9900+00

Answer 25

The wind is light and variable and the temperature is 0C

Question 26

Winds and Temperatures Aloft: What is the significance of the following: 763821

Answer 26

Subtract 50 from 76, this gives you 26. This means that the wind is coming from 260 TRUE. Add 100 to 38, this means that the wind speed is 138 knots. The temperature is a -21C.

Question 27

Winds and Temperatures Aloft: What if the winds are 200 knots or greater?

Answer 27

The chart simply codes the winds as if they were 199 knots.

Question 28

What is an isobar?

Answer 28

Line of equal pressure reduced to see level

Question 29

Surface Analysis Chart: How can you tell if the weather is VFR, MVFR, IFR

Answer 29

VFR- No line MVFR- Line around it IFR- Line around it with shading

Question 30

The high level significant prog chart is used for what altitudes?

Answer 30

FL250 to FL600

Question 31

Is the weather depiction chart actual or forecast?

Answer 31

Actual

Question 32

Is a prognostic chart actual or forecast?

Answer 32

Forecast

Question 33

What does a convective sigmet talk about?

Answer 33

Embedded thunderstorms Lines of thunderstorms Thunderstorms with 3/4 inch hale and tornadoes

Question 34

The outlook shown covers what time after the Sigmet?

Answer 34

2 to 6 hours

Question 35

What are the four ways that ATC will describe precipitation?

Answer 35

Light, moderate, heavy, extreme

Question 36

Sigmets are issued when conditions effect an area of at least how much?

Answer 36

At least 3,000 square miles.

Question 37

What do the following MB values equate to in ft: 500 MB 300 MB 200 MB

Answer 37

18,000 ft 30,000 ft 39,000 ft